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Zhang QW, Wang NL, Liu XY, Chen FH, Wang CF, Ji A, Liu XC.Zhang QW, et al. Among authors: liu xy, liu xc.Zhonghua Yan Ke Za Zhi. 2009 Dec;45(12):1105-10.Zhonghua Yan Ke Za Zhi. 2009.PMID: 20193434Chinese.
Cai CM, Sun BC, Liu XY, Wang JJ, Li JF, Han S, Wang NL, Lu QJ.Cai CM, et al. Among authors: liu xy.Chin Med J (Engl). 2005 Nov 20;118(22):1907-11.Chin Med J (Engl). 2005.PMID: 16313846No abstract available.
Liu X, Hu Y, Filla MS, Gabelt BT, Peters DM, Brandt CR, Kaufman PL.Liu X, et al.Mol Vis. 2005 Dec 13;11:1112-21.Mol Vis. 2005.PMID: 16379023Free article.
Cai CM, Sun BC, Liu XY.Cai CM, et al. Among authors: liu xy.Zhonghua Yan Ke Za Zhi. 2006 Apr;42(4):334-7.Zhonghua Yan Ke Za Zhi. 2006.PMID: 16762212Chinese.